Can we from Europe order from official webstore in USA, 'cause almost everything is more expensive on this europian shop for almost 50 % 
You can, but prices don't differ that much in the end.
Prices for the items are a lot cheaper in the US, shipping to Europe ain't.
$22 for a hooded sweatshirt!
$11 for one t-shirt.
2 shirts shipping: $15.10 = $43.08 in total = about 35 Euro's
Unless you really want to save that one or 2 Euro's...you can order from the US, otherwise it doesn't make much difference in the end.
Hooded zip thingy is only available in the US as XXL.
Looking in the online European shop, XL is the biggest one.
I need XXL for this zip thingy....